jagex hardley EVER unbans accounts, the only time i have ever seen an account unbanned is when you actually get a hold of a jmod and somehow get them to believe that you were banned for being hacked or something you didn't do, i personally work with someone on my bug abuse team who knows alota jmods and not even he can get people unbanned for stupid reasons. jagex is impossible to get a hold of and there customer support is shit >.> another person i work with has been forum banned since 07 and not even then will a jmod make an exception just be cause he used to be a forum warrior as a kid on the rs forums.
so unless you your friends with a jmod your acc is banned for good >.>